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Finding the Fourth Proportional to 1,145.12, 1,717.36 and 375.52

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Solution

The fourth proportional to 1,145.12, 1,717.36 and 375.52 is: 563.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.12 : 1,717.36 = 375.52 : x
  2. Step 2: Convert to fraction form
    1,145.12/1,717.36 = 375.52/x
  3. Step 3: Cross multiply
    1,145.12x = 1,717.36 × 375.52
  4. Step 4: Simplify right side
    1,145.12x = 644,903.03
  5. Step 5: Solve for x
    x = 644,903.03/1,145.12
  6. Step 6: Final answer
    x = 563.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.